Search

In a new study, researchers at Lawson Health Research Institute and Western University are demonstrating that gait, or motion testing, while simultaneously performing a cognitively demanding task can be an effective predictor of progression to dementia and eventually help with earlier diagnosis. To date, there is no definitive way for health care professionals to forecast the onset of dementia in a patient with memory complaints.

Dr. Manuel Montero-Odasso, a Lawson scientist, geriatrician at St. Joseph’s Health Care London, and associate professor in the Division of Geriatric Medicine at Western University’s Schulich School of Medicine & Dentistry, is leading the “Gait and Brain Study.” His team is assessing up to 150 seniors with mild cognitive impairment (MCI), a slight decline of memory and other mental functions which is considered a pre-dementia syndrome, in order to detect an early predictor of cognitive and mobility decline and progression to dementia.

Image

Dr. Montero-Odasso with study participant, Roy Bratty

“Finding methods to detect dementia early is vital to our ability to slow or halt the progression of the disease,” says Dr. Montero-Odasso. The study, funded by the Canadian Institutes of Health Research, followed participants for six years and included bi-annual visits. Researchers asked participants to walk while simultaneously performing a cognitively demanding task, such as counting backwards or naming animals. Those individuals with MCI that slow down more than 20 per cent while performing a cognitively demanding task are at a higher risk of progressing to dementia.

“While walking has long been considered an automatic motor task, emerging evidence suggests cognitive function plays a key role in the control of walking, avoidance of obstacles and maintenance of navigation,” says Dr. Montero-Odasso. “We believe that gait, as a complex brain-motor task, provides a golden window of opportunity to see brain function.”

The “gait cost,” or speed at which participants completed a single task (walking) versus a dual-task, was higher in those MCI individuals with worse episodic memory and who struggle with executive functions such as attention keeping and time management.

“Our results reveal a ‘motor signature’ of cognitive impairment that can be used to predict dementia,” adds Dr. Montero-Odasso. “It is conceivable that we will be able to diagnose Alzheimer’s disease and other dementias before people even have significant memory loss. Our hope is to combine these methods with promising new medications to slow or halt the progression of MCI to dementia.”

The study, “Association of Dual-Task Gait with Incident Dementia in Mild Cognitive Impairment”, was published in the journal, JAMA NEUROLOGY.

Image

Members of the study’s research team, from left to right: Korbin Blue, Research Assistant (Co-op Student); Yanina Sarquis-Adamson, Lab Research Assistant; Frederico Faria, Post-Doctoral Fellow; Dr. Montero Odasso, Director, Gait and Brain Lab; research participant; Alanna Black, Lab Research Coordinator; Stephanie Cullen, Research Assistant (Undergraduate Student); and, Navena Lingum, Research Assistant (Master Student). 

Dr. Donna Goldhawk, an imaging scientist at Lawson Health Research Institute (Lawson), is providing a unique and valuable learning experience to senior high school students. Since 2009, she has accepted students to train in her hospital-based research laboratory at St. Joseph’s Health Care London in partnership with secondary schools in the Thames Valley region.

Dr. Goldhawk recruits students in partnership with the Partners in Experiential Learning (PEL) program. This unique academic co-op education program in London, Ontario identifies high school students interested in health research and prepares them for placement in a health research environment. The students earn senior high school credits and receive training in basic laboratory research.

Originally conceived by Dr. Jim Koropatnick, a cancer scientist at Lawson, and Mr. Rodger Dusky, a retired secondary school teacher, PEL has been running successfully since 2004. It is a partnership between the Thames Valley District School Board, London District Catholic School Board, the Ontario Ministry of Education, Western University, London Health Sciences Centre and St. Joseph’s Health Care London. In Dr. Goldhawk’s experience, PEL attracts an excellent calibre of student who is eager to learn, aspiring to further education and capable of contributing to the science of molecular imaging.

Through the Ontario Research Fund (ORF), the Ministry of Research and Innovation also recognizes the value of attracting youth to the scientific enterprise and provides funding to support youth outreach. Dr. Goldhawk oversees one such initiative, approved under a grant entitled “Heart Failure: Prevention through Early Detection Using New Imaging Methods”. She works with PEL to attract summer students with an interest in molecular imaging.

This year, a total of three ORF summer studentships are available at the following collaborating research labs: Lawson Health Research Institute (London), University of Ottawa Heart Institute (Ottawa) and Sunnybrook Research Institute (Toronto). To learn more about these summer studentships, please email Dr. Goldhawk at @email by May 25, 2018.

Participating students can expect experiential learning tailored to their current understanding of science and aimed at expanding this knowledge for a fuller appreciation of biomedical research.

“ORF youth outreach recognizes the role of medical imaging in today’s workplace and promotes the study of cardiovascular disease in the next generation of researchers,” says Mr. Dusky. “This fills a clear gap in knowledge and career planning for high school youth.”

In Dr. Goldhawk’s laboratory, for example, cardiac research is focussed on the measurement of iron contrast using magnetic resonance imaging (MRI). “Many cells have naturally distinct iron metabolism. However, we are also using genes from magnetic bacteria to improve the magnetic sensitivity of mammalian cells. MRI can then be used to detect disease processes in living subjects.”

“We are particularly interested in reporter gene expression for MRI, a term coined to describe how changes in the pattern of gene activity, and its related protein activity, may be visualized.” Her research group uses laboratory models to track these biological molecules, particularly those involved in cardiac inflammation and cancer growth and metastasis.

Her current team of four graduate and four undergraduate students span various stages of their chosen programs. In this setting, high school students step into a work atmosphere where they interact with colleagues at multiple levels. In addition, since molecular imaging research is inherently interdisciplinary, students acquire training in both biology and physics.

Dr. Goldhawk finds that students exposed to high-quality science education more easily envision themselves in positions of responsibility within the health care sector. Youth learn that developing a scientific career is a process with many choices for fusing interests with a specific occupation.

“To retain the interest of talented young scientists, it is essential to provide them with interesting challenges that reward their curiosity and ambition to learn,” explains Dr. Goldhawk. “In hospital-based research institutes, youth are also exposed to the clinical side for which our research is targeted. This is a quality scientific experience for youth interested in expanding their outlook, performance, technical, problem-solving and record-keeping skills. I think it is essential to build these opportunities into our scientific programs.”

Image

Above: Suhail Shukri, 2018 PEL student at Oakridge Secondary School, and Sarah Donnelly, 2013 PEL student at Wilfred Laurier Secondary School and current MSc candidate at Western University’s Schulich School of Medicine & Dentistry, training with Dr. Jeremy Burton and Dr. Donna Goldhawk at Lawson Health Research Institute. 

Lawson Health Research Institute – the research institute of London Health Sciences Centre (LHSC) and St. Joseph’s Health Care London – is ranked seventh in the country in Re$earch Infosource’s 2023 list of Canada’s Top 40 Research Hospitals. 

This is the 13th year in a row that Lawson has ranked top ten in the country, and the seventh-place ranking is up two spots from 2022 – highlighting continued dedication to hospital-based research at LHSC and St. Joseph’s.

Lawson also ranked second for research intensity among the large tier institutions with more than $776,000 of research spending per researcher.

“These rankings help LHSC and St. Joseph’s assess how we compare to similar hospitals across the country,” says Dr. David Hill, Scientific Director at Lawson and Integrated Vice President, Research at LHSC and St. Joseph’s. “Our continuous placement in the top 10 of all research hospitals shows we are doing important and relevant medical research that is making a difference to patient care.”

Lawson has been at the forefront of research in a wide range of specializations, making advances in areas from cancer care and mental health supports to molecular imaging and theranostics in recent years.

“Conducting research in hospitals means it can go from bench to bedside much more quickly,” says Dr. Hill. “Things move much faster now than they ever did. Our top 10 ranking shows we are leading the way, and that funders are confident in London’s hospital-based researchers.”

The top 40 list analyzes hospital-based research institutes from across the country on several metrics, including total research expenditure from the previous fiscal year. The ranking looks at funds from all sources, including both internal and external, to support research in hospitals.